Determine the slope of the line given two points (-3 -1) and (5,-5

Charlie is a car salesman he earns $800 plus a 9% commission on all of her sales for the week if charlie receive the payment for $1960 this week how much where is total sales

What is the slope of the line that contains the points (4,8) and (9,8)? what type of line is it?

In the diagram below, tan θ = sqrt 3. what is the value of m?